# Gretio vs MaxiAP Diag

The clearest difference is review sentiment: Gretio at 68% against MaxiAP Diag's 0%. Gretio also leads on rating (3.8 vs 2.9) and update cadence (monthly vs every 5 months). MaxiAP Diag's advantage is iOS requirement (13.0 vs 18.0). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Gretio sells 4 in-app purchases, starting at $19.99 per year and MaxiAP Diag sells 28 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Gretio holds the better App Store score, 3.8 against 2.9. Both are backed by a comparable volume of ratings — 23 and 10 respectively. Written reviews point the same way: 68% of Gretio's written reviews are positive against 0% of MaxiAP Diag's.

Gretio ships an update monthly, MaxiAP Diag every 5 months. The most recent releases landed on October 29, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Gretio | MaxiAP Diag |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.8 (23 ratings)](https://appshunter.io/ios/app/gretio/id1498320180/reviews)** | [2.9 (10 ratings)](https://appshunter.io/ios/app/maxiap-diag/id6463833580/reviews) |
| Number of ratings | **23** | 10 |
| Positive reviews | **68.4% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Monthly** | Every 5 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 40 MB | 104 MB |
| Requires iOS | 18.0 | **13.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Surreal Development LLC](https://appshunter.io/developer/1498320179) | [Autel Intelligent Technology Co., Ltd.](https://appshunter.io/developer/770747094) |

## What reviewers say

### Gretio

[App page](https://appshunter.io/ios/app/gretio/id1498320180)

This app allows advanced vehicle diagnostics and service functions for diesel, gas, electric, and hybrid cars. It analyzes thousands of data points, looks up trouble codes across all modules, and performs service regenerations and tests. Designed for DIY users, it requires specific hardware and vehicle compatibility.

**Highlights:** Advanced vehicle diagnostics, Analyze thousands of data points, Diagnostic trouble code lookup, Perform service functions (DPF regen, SCR tests), Program vehicle features, Supports diesel, gas, electric, hybrid vehicles

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Gretio All Access | $19.99 | per year |
| Gretio RPO Pack 1 | $34.99 | one-time |
| Gretio RPO Pack 2 | $34.99 | one-time |
| RPO Pack 3 | $34.99 | one-time |


### MaxiAP Diag

[App page](https://appshunter.io/ios/app/maxiap-diag/id6463833580)

This management app helps DIY vehicle owners with repairs, maintenance, and customization. It offers diagnostic insights, common dashboard light explanations, and service functions for various car models. Monitor your vehicle's health and access repair shop information.

**Highlights:** Enhanced system diagnostics, OBDII test (read/erase codes, live data), Auto VIN vehicle identification, Vehicle health monitoring, DIY service functions (oil reset, TPMS), EV/Hybrid battery testing, Common dashboard light guide

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (28)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Mazda for one year | $21.99 | one-time |
| Mini for one year | $21.99 | one-time |
| INFINITI for one year | $21.99 | one-time |
| Lamborghini for one year | $21.99 | one-time |
| Mitsubishi for one year | $21.99 | one-time |
| Cadillac for one year | $21.99 | one-time |
| Chrysler for one year | $21.99 | one-time |
| Scion for one year | $21.99 | one-time |
| Subaru for one year | $21.99 | one-time |
| GMC for one year | $21.99 | one-time |
| Buick for one year | $21.99 | one-time |
| Audi for one year | $21.99 | one-time |
| Acura for one year | $21.99 | one-time |
| Lexus for one year | $21.99 | one-time |
| Volkswagen for one year | $21.99 | one-time |
| Nissan for one year | $21.99 | one-time |
| Ford for one year | $21.99 | one-time |
| Honda for one year | $21.99 | one-time |
| BMW for one year | $21.99 | one-time |
| Chevrolet for one year | $21.99 | one-time |
| Dodge for one year | $21.99 | one-time |
| Hyundai for one year | $21.99 | one-time |
| Jeep for one year | $21.99 | one-time |
| Kia for one year | $21.99 | one-time |
| Mercedes-Benz for one year | $21.99 | one-time |
| Ram for one year | $21.99 | one-time |
| Toyota for one year | $21.99 | one-time |
| Volvo for one year | $21.99 | one-time |


## Frequently asked questions

### Is Gretio free?

Gretio is free to download, with in-app purchases available.

### Is MaxiAP Diag free?

MaxiAP Diag is free to download, with in-app purchases available.

### Which has better reviews, Gretio or MaxiAP Diag?

Gretio is rated higher. Gretio averages 3.8 out of 5 from 23 ratings, while MaxiAP Diag averages 2.9 from 10 ratings.

### Do Gretio or MaxiAP Diag have ads?

Neither Gretio nor MaxiAP Diag shows ads.

### Which is updated more often, Gretio or MaxiAP Diag?

Gretio ships an update monthly, and MaxiAP Diag every 5 months. Most recently, Gretio was updated on October 29, 2026 and MaxiAP Diag on October 20, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*